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PC Scheme, also known as PCS, is a historical computer programming language that was predominantly used in the 1980s. Developed by Texas Instruments, it was a dialect of the Scheme programming language specifically designed for IBM PCs. PC Scheme was known for its simplicity and efficiency, making it a popular choice among early programmers. It played a significant role in the evolution of computer programming, setting the stage for many modern languages. This information is referenced from "The Scheme Programming Language" by R. Kent Dybvig and "History of Programming Languages" by Thomas J. Bergin and Richard G. Gibson.

Ask the right questions secure the right PC Scheme(PCScheme or PCS ) talent among an increasingly shrinking pool of talent.

First 20 minutes

General PC Scheme(PCScheme or PCS ) app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in PC Scheme(PCScheme or PCS ) application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

How would you describe the main features of PC Scheme?

PC Scheme is a dialect of the Lisp programming language. It is known for its simplicity, efficiency, and flexibility. It supports first-class procedures, proper tail recursion, lexical scoping, and interactive programming.

What are the data types in PC Scheme?

The data types in PC Scheme include integers, floating-point numbers, characters, strings, symbols, lists, vectors, and procedures.

Describe the difference between a symbol and a string in PC Scheme.

In PC Scheme, a symbol is a unique identifier, whereas a string is a sequence of characters. Symbols are often used as keys or identifiers, while strings are used to store and manipulate text.

How would you define a procedure in PC Scheme?

In PC Scheme, a procedure is defined using the 'define' keyword, followed by the procedure name, parameters in parentheses, and the procedure body. For example, '(define (add a b) (+ a b))' defines a procedure that adds two numbers.

What are the control structures in PC Scheme?

PC Scheme supports various control structures such as conditional statements (if, cond, case), looping constructs (do, let, let*), and procedure calls.

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What you’re looking for early on

Does the candidate have a strong understanding of PCScheme or similar languages?

Can the candidate demonstrate problem-solving skills?

Has the candidate worked on projects similar to ours in the past?

Does the candidate exhibit strong communication skills?

Next 20 minutes

Specific PC Scheme(PCScheme or PCS ) development questions

The next 20 minutes of the interview should focus on the candidate's expertise with specific backend frameworks, their understanding of RESTful APIs, and their experience in handling data storage and retrieval efficiently.

Describe the difference between 'let' and 'let*' in PC Scheme.

'let' and 'let*' are used to bind variables in PC Scheme. The difference is that 'let' binds all variables simultaneously, while 'let*' binds them sequentially, allowing each binding to see the bindings made earlier in the same 'let*' expression.

How would you implement recursion in PC Scheme?

Recursion in PC Scheme can be implemented by defining a procedure that calls itself. For example, the factorial function can be implemented as '(define (factorial n) (if (= n 0) 1 (* n (factorial (- n 1)))))'.

What are the higher-order procedures in PC Scheme?

Higher-order procedures in PC Scheme are procedures that can take other procedures as arguments or return procedures as results. Examples include 'map', 'filter', and 'reduce'.

Describe the difference between 'map' and 'filter' in PC Scheme.

'map' applies a procedure to each element of a list and returns a list of the results, while 'filter' applies a predicate to each element of a list and returns a list of elements for which the predicate returns true.

How would you handle exceptions in PC Scheme?

PC Scheme provides the 'with-exception-handler' procedure for handling exceptions. It takes two arguments: a procedure to be executed, and an exception handler to be invoked if an exception is raised during the execution of the procedure.

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At this point, a skilled PC Scheme(PCScheme or PCS ) engineer should demonstrate strong problem-solving abilities, proficiency in PC Scheme(PCScheme or PCS ) programming language, and knowledge of software development methodologies. Red flags include lack of hands-on experience, inability to articulate complex concepts, or unfamiliarity with standard coding practices.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with PC Scheme(PCScheme or PCS ).

What does this basic PCScheme code do?
(define (square x) (* x x))
This code defines a function named 'square' that takes one argument 'x' and returns the square of 'x'.
What is the output of following PCScheme code?
(define x 10) (define y 20) (+ x y)
This code first defines 'x' as 10 and 'y' as 20. Then it adds 'x' and 'y'. So, the output will be 30.
What does the following PCScheme code do?
(define (map f lst) (if (null? lst) '() (cons (f (car lst)) (map f (cdr lst)))))
This code defines a function 'map' that takes a function 'f' and a list 'lst' as arguments. It applies the function 'f' to each element of the list and returns a new list with the results.
What does the following PCScheme code do?
(define (parallel-execute f1 f2) (thread (lambda () (f1))) (thread (lambda () (f2))))
This code defines a function 'parallel-execute' that takes two functions 'f1' and 'f2' as arguments. It creates two threads and executes 'f1' and 'f2' in parallel.

Wrap-up questions

Final candidate for PC Scheme(PCScheme or PCS ) Developer role questions

The final few questions should evaluate the candidate's teamwork, communication, and problem-solving skills. Additionally, assess their knowledge of microservices architecture, serverless computing, and how they handle PC Scheme(PCScheme or PCS ) application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

What are the macros in PC Scheme?

Macros in PC Scheme are syntactic extensions that allow programmers to introduce new syntactic constructs in the language. They are defined using the 'define-syntax' keyword.

Describe the difference between a macro and a procedure in PC Scheme.

The main difference between a macro and a procedure in PC Scheme is when they are evaluated. A macro is evaluated at compile time and can generate code based on its input, while a procedure is evaluated at runtime.

How would you implement a macro in PC Scheme?

A macro in PC Scheme can be implemented using the 'define-syntax' keyword, followed by the macro name and a transformer procedure that specifies how the macro should be expanded. For example, '(define-syntax unless (syntax-rules () ((_ test expr) (if (not test) expr))))' defines an 'unless' macro.

PC Scheme(PCScheme or PCS ) application related

Product Perfect's PC Scheme(PCScheme or PCS ) development capabilities

Beyond hiring for your PC Scheme(PCScheme or PCS ) engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in PC Scheme(PCScheme or PCS ) projects, and can engage in multiple capacities.

PC Scheme(PCScheme or PCS ) Consultive assessments

PC Scheme(PCScheme or PCS ) Application Conversion Assessment PC Scheme(PCScheme or PCS ) Application Integration Assessment PC Scheme(PCScheme or PCS ) Data & Database Integration Assessment

Custom PC Scheme(PCScheme or PCS ) development projects

Custom PC Scheme(PCScheme or PCS ) App Conversion PC Scheme(PCScheme or PCS ) Custom App Development Process App UI Design for PC Scheme(PCScheme or PCS ) Facelifts

Hiring guide for PC Scheme(PCScheme or PCS ) Engineers

PC Scheme(PCScheme or PCS ) Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

What you’re looking to see on the PC Scheme(PCScheme or PCS ) engineer at this point.

PC Scheme(PCScheme or PCS ) Consultive assessments

Custom PC Scheme(PCScheme or PCS ) development projects